""" Main webapp handlers. """

import os
import json

from flask import request, render_template, jsonify, redirect, url_for

from vasl_templates.webapp import app
from vasl_templates.webapp.config.constants import DATA_DIR

# ---------------------------------------------------------------------

@app.route( "/" )
def main():
    """Return the main page."""
    return render_template( "index.html" )

# ---------------------------------------------------------------------

@app.route( "/help" )
def show_help():
    """Show the help page."""
    url = url_for( "static", filename="help/index.html" )
    if request.args.get( "embedded" ):
        url += "?embedded=1"
    return redirect( url, code=302 )

# ---------------------------------------------------------------------

default_scenario = None

@app.route( "/default-scenario" )
def get_default_scenario():
    """Return the default scenario."""

    # check if a default scenario has been configured
    if default_scenario:
        fname = default_scenario
    else:
        fname = os.path.join( app.config.get("DATA_DIR",DATA_DIR), "default-scenario.json" )

    # return the default scenario
    with open(fname,"r") as fp:
        return jsonify( json.load( fp ) )

# ---------------------------------------------------------------------

@app.route( "/ping" )
def ping():
    """Let the caller know we're alive."""
    return "pong"

# ---------------------------------------------------------------------

@app.route( "/shutdown" )
def shutdown():
    """Shutdown the webapp (for testing porpoises)."""
    request.environ.get( "werkzeug.server.shutdown" )()
    return ""